Battery-capacity management device
First Claim
1. A battery-capacity management device comprising:
- a voltage detector adapted to detect a terminal voltage of a battery;
a current detector adapted to detect a discharge current discharged from the battery;
discharged-capacity calculating unit adapted to calculate a discharged capacity of the battery;
a storage location adapted to contain prestored map data that represents relationships between terminal voltages and discharge currents of the battery at states in which a remaining capacity of the battery has reached a preset value; and
an available-capacity calculating unit adapted to calculate a second available capacity of the battery based on a specific discharged capacity, the specific discharged capacity being calculated by the discharged-capacity calculating unit and being a capacity discharged over a period between a time when charging of the battery to a first available capacity thereof is completed and a time when the terminal voltage of the battery detected by the voltage detector reaches a voltage value corresponding to the current value detected by the current detector in the map data, and the available-capacity calculating unit also updating the first available capacity to the second available capacity.
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Accused Products
Abstract
A battery-capacity management device comprises a charged/discharged-capacity integrating unit that detects a voltage and a current of a driving battery and that calculates a discharged capacity of the driving battery. The device also comprises a battery temperature sensor that detects a temperature of the driving battery, a memory, and an available-capacity calculating unit. Map data that represents relationships among voltages, currents, and temperatures of the driving battery at states in which remaining capacity of the driving battery has reached a preset value can be stored in the memory. The available-capacity calculating unit calculates a renewed available capacity of the driving battery based on a discharge capacity discharged over a period between a time when the driving battery is charged and a time when the voltage value detected by the charged/discharged-capacity integrating unit reaches a voltage value corresponding to the current value and the battery temperature in the map data.
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Citations
16 Claims
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1. A battery-capacity management device comprising:
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a voltage detector adapted to detect a terminal voltage of a battery; a current detector adapted to detect a discharge current discharged from the battery; discharged-capacity calculating unit adapted to calculate a discharged capacity of the battery; a storage location adapted to contain prestored map data that represents relationships between terminal voltages and discharge currents of the battery at states in which a remaining capacity of the battery has reached a preset value; and an available-capacity calculating unit adapted to calculate a second available capacity of the battery based on a specific discharged capacity, the specific discharged capacity being calculated by the discharged-capacity calculating unit and being a capacity discharged over a period between a time when charging of the battery to a first available capacity thereof is completed and a time when the terminal voltage of the battery detected by the voltage detector reaches a voltage value corresponding to the current value detected by the current detector in the map data, and the available-capacity calculating unit also updating the first available capacity to the second available capacity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A battery-capacity management device comprising:
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a voltage detector that is adapted to detect a terminal voltage of a battery; a current detector that is adapted to detect a discharge current discharged from the battery; a battery-temperature detector that is adapted to detect a temperature of the battery; a discharged-capacity calculating unit that is adapted to calculate a discharged capacity of the battery; memory that is adapted to contain prestored map data that represents relationships among terminal voltages, discharge currents, and battery temperatures of the battery at states in which a remaining capacity of the battery has reached a preset value; and an available-capacity calculating unit that is adapted to calculate a second available capacity of the battery based on a specific discharged capacity, the specific discharged capacity being calculated by the discharged-capacity calculating unit and being a capacity discharged over a period between a time when charging of the battery to a first available capacity thereof is completed and a time when the terminal voltage of the battery detected by the voltage detector reaches a voltage value corresponding to the current value detected by the current detector and a battery temperature detected by the battery-temperature detector in the map data, and the available-capacity calculating unit updating the first available capacity to the second available capacity. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification